Windows Defender shows GUI at PC start up

Question

I am running Windows 7 64 bit on my PC. For a few weeks now, when I boot up my PC, the Windows Defender interface displays and I have to close it with the x each time. Even if I disable Defender, I still get a message saying that it is turned off and asking me if I would like to enable it. It's no big deal, but it's a bit annoying and I'd like to find a fix for it if possible.

Answer 1

1. Start > type msconfig in the search box and press Enter.
2. Select the Startup tab (the fourth one).
3. Uncheck Windows Defender (manufacturer Microsoft) or anything that you think is malicious software (uncheck all unknown manufacturers).
4. Restart your machine...